轨道交通诱发土体振动特性的现场测试研究

Research on Field Test of Soil Vibration Characteristics Induced by Rail Transit

通过分析上海罗山路高架、地铁16号线高架、磁悬浮高架和地面交通的现场测试振动特性,并比较磁悬浮附近不同距离测量点的振动特性,以研究其振动衰减规律.结果表明,地铁高架产生的振动最强,而罗山路高架在三种高架中最小;地铁高架的振动大都集中在30~60 Hz之间,磁悬浮高架分布在65~85 Hz之间,罗山路高架分布比较平均,地面振动大都分布在0~20 Hz之间;振动会随着距离发生衰减,小于20 Hz的振动衰减速度比较慢,而大于20 Hz的振动很快便衰减完成.

By analyzing the field test vibration characteristics of Shanghai Luoshan Road viaduct, metro viaduct, maglev viaduct and ground traffic, and comparing the vibration characteristics of measurement points at different distances near the maglev viaduct, the vibration attenuation law is studied. Studies have shown that the highest vibration is generated by the metro viaduct, and the lowest vibration is generated by the Luoshan Road viaduct among the three viaducts. Most of the vibrations of the metro viaduct are between 30~60 Hz, the vibrations of the maglev viaduct are distributed between 65~85 Hz, the vibration distribution of the Luoshan Road viaduct roads is relatively even, and the vibrations induced by ground are mostly distributed between 0~20 Hz. Vibration attenuates with distance, vibration attenuation less than 20 Hz is slower, while vibration greater than 20 Hz is quickly attenuated.